Communication's Tower

A very long time ago using Resin coated photographic paper there was a process called " Etch Bleach " where the image was bleached out after first development the paper was then gently rubbed to remove the resin . then coloured by using cold water dye. I did quite a few to give a high contrast image , but can't quite remember the full process. this is how a typical image looked after the process. What I do remember is that a photographic  negative to start with ended up as a negative image, so starting with a slide ended up with a positive image !  This image is a digital image manipulated to give the effect, so only took a couple of minutes rather than a few hours in the darkroom !!